The Dia Art Foundation is a unique thing, a non-profit that collects a limited roster of artists in depth, especially Minimalists and Conceptual artists, and gives them the kind of long term exhibition space their work requires. This can get tricky when you’re talking about something like Walter de Maria’s New York Earth Room, a big spanking white room covered in about two feet of soil, an installation they’ve supported for decades in SoHo.

In the 1970s, ’80s and ’90s, Dia was a force to be reckoned with, and generally a force for good. In the hubble-bubble of the New York art world, they represented the values of the long duration. But in 2003 they opened a big new exhibition space in a converted Nabisco box factory in Beacon, N.Y., on the banks of the Hudson River about a hour north of New York. Around the same time they also shut down their headquarters in the Chelsea neighborhood of lower Manhattan, where they did changing exhibitions. Beacon is a great place, but gradually Dia faded from view in New York. Now they’re finally coming back.